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Finding the Fourth Proportional to 612,608.12, 918,312.24 and 342,867.96

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Solution

The fourth proportional to 612,608.12, 918,312.24 and 342,867.96 is: 513,966.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,608.12 : 918,312.24 = 342,867.96 : x
  2. Step 2: Convert to fraction form
    612,608.12/918,312.24 = 342,867.96/x
  3. Step 3: Cross multiply
    612,608.12x = 918,312.24 × 342,867.96
  4. Step 4: Simplify right side
    612,608.12x = 314,859,844,371.83
  5. Step 5: Solve for x
    x = 314,859,844,371.83/612,608.12
  6. Step 6: Final answer
    x = 513,966.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.